Glossary
Gwei
Gwei is a small denomination of Ether, the native currency of the Ethereum network, commonly used to express the cost of transaction fees. One Gwei equals one-billionth of one Ether.
Gwei (short for "giga-wei") is a unit used to measure very small amounts of Ether, the native asset of the Ethereum network. Ether can be divided into smaller units, and the smallest of these is called a wei. One Ether is made up of a billion Gwei, and each Gwei is itself made up of a billion wei. Because Ether values are often tiny at the transaction level, Gwei offers a more readable way to talk about them without long strings of decimal places.
The close-up: Gwei is the denomination people reach for when discussing gas — the fee paid to have a transaction processed and included on the network. Fees are quoted in Gwei because the amounts involved are small relative to a whole coin, making Gwei a practical, human-friendly scale for the numbers wallets and explorers display.
The wide shot: Denominations like Gwei mirror how traditional currencies use smaller units, such as cents within a dollar. They exist because a blockchain must account for value precisely, down to fractions far finer than a whole unit. Understanding Gwei helps you read fee estimates and network activity with clarity. As always, this is educational context, not financial advice — do your own research.